Flux pinning and grain coupling in Bi2Sr2CaCu2O8+δ ceramics:: Magneto-optical investigations

被引：0

作者：

Huang, SL ^{[1
]}

Koblischka, MR

Johansen, TH

Bratsberg, H

Fossheim, K

机构：

[1] NTNU Trondheim, Dept Phys, N-7034 Trondheim, Norway

[2] Univ Oslo, Dept Phys, N-0316 Oslo, Norway

来源：

APPLIED SUPERCONDUCTIVITY 1997, VOLS 1 AND 2: VOL 1: SMALL SCALE AND ELECTRONIC APPLICATIONS; VOL 2: LARGE SCALE AND POWER APPLICATIONS | 1997年 / 158期

关键词：

HIGH-TC SUPERCONDUCTORS; BEHAVIOR;

D O I：

暂无

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Efforts are being made to improve the flux pinning and grain coupling in bulk Bi-2212 ceramics, prepared by a partial melting process. For this purpose, the penetration of vortices is visualized by means of the magneto-optical Faraday effect technique at various temperatures ranging from 18 K up to 77 K. Our Bi-2212 ceramic samples are found to show a strong coupling between the grains, which is manifested by the observation of a flux front propagating into the sample on increasing field. To investigate the pinning properties, we studied remanent states obtained after applying external magnetic fields up to 160 mT.

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页码：1137 / 1140

页数：4

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